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Finding the Fourth Proportional to 611,116.80, 918,057.60 and 424,492.80

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Solution

The fourth proportional to 611,116.80, 918,057.60 and 424,492.80 is: 637,699.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    611,116.80 : 918,057.60 = 424,492.80 : x
  2. Step 2: Convert to fraction form
    611,116.80/918,057.60 = 424,492.80/x
  3. Step 3: Cross multiply
    611,116.80x = 918,057.60 × 424,492.80
  4. Step 4: Simplify right side
    611,116.80x = 389,708,841,185.28
  5. Step 5: Solve for x
    x = 389,708,841,185.28/611,116.80
  6. Step 6: Final answer
    x = 637,699.44

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.